<!DOCTYPE html> <html> <head><title>Test accent/accentunder</title></head> <body> <math displaystyle="false"> <munderover accentunder="true" accent="true"> <mo>∑</mo> <mi>a</mi> <mi>b</mi> </munderover> </math> <math displaystyle="false"> <munder accentunder="true"> <mo>∑</mo> <mi>a</mi> </munder> </math> <math displaystyle="false"> <mover accent="true"> <mo>∑</mo> <mi>a</mi> </mover> </math> </body> </html>